Package com.tonic.analysis.simulation.state

Enum SimValue.NullState

java.lang.Object

java.lang.Enum<SimValue.NullState>

com.tonic.analysis.simulation.state.SimValue.NullState

All Implemented Interfaces:

Serializable, Comparable<SimValue.NullState>

Enclosing class:

SimValue

public static enum SimValue.NullState
extends Enum<SimValue.NullState>

What is known about a reference value's nullness.

Enum Constant Summary

Enum Constants

Enum Constant	Description
DEFINITELY_NOT_NULL	The value is non-null on every path, as for a fresh allocation.
DEFINITELY_NULL	The value is null on every path reaching this point, as for a simulated null constant.
MAYBE_NULL	Nullness is unknown; also the result of merging two values whose states disagree, and the default for a value with no null information.

Method Summary

Modifier and Type	Method	Description
static SimValue.NullState	valueOf(String name)	Returns the enum constant of this type with the specified name.
static SimValue.NullState[]	values()	Returns an array containing the constants of this enum type, in the order they are declared.

Methods inherited from class java.lang.Enum

compareTo, equals, getDeclaringClass, hashCode, name, ordinal, toString, valueOf

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Enum Constant Detail

DEFINITELY_NULL

public static final SimValue.NullState DEFINITELY_NULL

The value is null on every path reaching this point, as for a simulated null constant.

DEFINITELY_NOT_NULL

public static final SimValue.NullState DEFINITELY_NOT_NULL

The value is non-null on every path, as for a fresh allocation.

MAYBE_NULL

public static final SimValue.NullState MAYBE_NULL

Nullness is unknown; also the result of merging two values whose states disagree, and the default for a value with no null information.

Method Detail

values

public static SimValue.NullState[] values()

Returns an array containing the constants of this enum type, in the order they are declared. This method may be used to iterate over the constants as follows:

for (SimValue.NullState c : SimValue.NullState.values())
    System.out.println(c);

Returns:

an array containing the constants of this enum type, in the order they are declared

valueOf

public static SimValue.NullState valueOf(String name)

Returns the enum constant of this type with the specified name. The string must match exactly an identifier used to declare an enum constant in this type. (Extraneous whitespace characters are not permitted.)

Parameters:

name - the name of the enum constant to be returned.

Returns:

the enum constant with the specified name

Throws:

IllegalArgumentException - if this enum type has no constant with the specified name

NullPointerException - if the argument is null